Whenever you mention the score, it is normal to say the name of the team that is winning. So even though you did not really specify which team is winning, it's implied. So you could even say "The score is 7 to 3, Giants," or "Giants, 3 to 7," and people would know that you mean the Giants are winning. Normally this means that the listener knows who the other team is. Probably, you mentioned that previously.
It is also common to say the score in the order that matches the order you said the teams. So you might say "The Giants and the Bears, 14 to 7," meaning that the Giants had 14 points and the Bears had 7. In this case, the winning team is usually mentioned first. This just makes it a little more clear. If you said "The Giants and the Bears, 7 to 14," its implied that the Bears won, but it just isn't as clear.
However, it is also common to omit the names entirely in some cases. If you are understood to support one team in particular you would say the score of your team first, as azimux mentioned. Otherwise, you would probably say the name of the away team first. However, this is VERY casual, and unclear to those who are unfamiliar to you.
It is not normal to say "winning team", though you might if the listener already knew the name of the team that was winning.
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